soc: qcom: glink_pkt: Add one to refcounting

Extra validation on the refcount APIs expect refcounts to be
initialized to a non zero value. In order to avoid warnings
for "increment on 0", start the refcount at 1.

Change-Id: I08ffca896cda6b1ec78168751a732b8157a30763
Signed-off-by: Chris Lew <clew@codeaurora.org>